Built from nearly nothing continued...

Discussion in 'Projects/Builds' started by 13andFreedom, Sep 29, 2018.

  1. 13andFreedom

    13andFreedom New Member

    Joined:
    Nov 26, 2015
    Messages:
    9
    Likes Received:
    2
    Well, December 2015 was when I announced here that I was going to rebuild what was basically a frame, fork, rear swing arm and shocks, and two fenders.

    Ha, only near 3 years later, I'm near done.

    Some used hubs and brake pedals restored. New electrical and ignition. Well pretty much everything was needed, and some stuff to restore. No need to list it all. I'm going for a resto-mod, but keep it stock like. My last purchase needed is a pirahna 140cc engine. I was able to find a performance muffler that's good to 180cc from CHP, but looks stock. The bike is coming along rather nicely so far.

    Question: can I use the stock throttle with a pirahna engine? Also, how important to upgrade from the 22m carb?
     
    nemesis88 likes this.
  2.  
  3. Ozpall

    Ozpall Member

    Joined:
    May 19, 2018
    Messages:
    48
    Likes Received:
    5
    You should def upgrade your carb. If going to a 140cc.
     
  4. racerx

    racerx Administrator
    Staff Member Administrator

    Joined:
    Jul 10, 2005
    Messages:
    13,098
    Likes Received:
    1,169
    22mm should be about right for that engine. The stock, internal, twist grip throttle assembly can accommodate 22mm travel...possibly a little more. I've been running the OEM assembly, with a real VM22 carburetor and for longer than this board has existed. The biggest issue you'll deal with is positive return when you let go of the grip. Definitely needs more spring and everything must move freely. FYI, beware of late-vintage OER throttle pipes. I've seen a few of them that were downright dangerous, due to misplacement of the internal helix. IDK how many of those made it to the vendors. These are easy enough to identify...twist the throttle to the WOT limit. If the slide goes right past...and launches off of...the helix it's a suicide throttle, called that because it'd leave the engine stuck at WOT. The older throttle pipes did not have this issue and work much more smoothly, to boot. The rest of the OER assembly parts are fine, no reason not to purchase them new.
     
  5. kirrbby

    kirrbby Well-Known Member

    Joined:
    May 28, 2009
    Messages:
    8,741
    Likes Received:
    1,077
    Your bike is shaping up VERY nicely. Thanks for the update.
     
  6. 13andFreedom

    13andFreedom New Member

    Joined:
    Nov 26, 2015
    Messages:
    9
    Likes Received:
    2
    Thanks for the replies. That's 1 recommendation for 22m carb and 1 for larger than 22m. I'm buying the engine from TBolt, they say they don't upgrade the carb on engine purchase, and I have to send it back for a purchase/exchange.

    The idea of finishing the little bike, is to put it in the back of the truck when pulling the camper trailer, and cruise it around the camp grounds.
     

Share This Page